Be careful

I was in the are a so I thought I would stop in and check out the talent. It was around 6 PM and there were a few girls talking with customers but no one on stage. In the hour I was there I only saw one girl on stage. Bought a drink (4$ pepsi) and sat at the bar for a few minutes. A busty AA girl sat down and started talking to me. after a few minutes asked if I wanted a private dance. Went for the $20 dance with good 2 way touching and dirty talk. After she convinced me to go upstairs for the $100 for 1/2 hour. This is where I should have stated at the bar. About 10 minutes in she starts with "put a 20 here and here and we'll have some fun." I fell for it once but didn't get much more than the dance she was already doing. Few minutes later she wants more tip claiming she gets nothing from the $100 up front, which I know is BS because I'v had dances here before and some have never even asked for tips(which for me will surely get them a tip). Anyway I told her I was low on cash and she already had a $40 tip from me. She was persistant but I really didn't have any more cash and time was up anyway. I collected my coat and left. I prefer to tip for good attitude and personality without being asked several times. I will go back but will not get a dance from her again.